Air translating apparatus



NOV. 17, 1942. v O

AI R TBANSLATING APPARATUS Filed April 9, 1940 INVENTOR Gus-ra H.

Patented Nov. 17, 1942 AIR TRANSLATING APPARATUS Gustav H. Koch, Springfield, Mass, assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation. of

Pennsylvania Application April B, 1940, Serial No. 328,602

4 Claims.

My invention relates to an electric fan and has for an object to provide improved apparatus of the character set forth.

An object is to provide an electric fan which will be economical to manufacture and ornamental in design.

A specific object is to provide an electric fan in which the fan guard may be attached to the motor housing without the use of expensive eyes and screws.

Another object is to provide an electric fan in which the fastening means for fastening the fan guard to the motor housing is located inside of the motor housing.

These and other objects are effected by my invention as will be apparent from the following description and claims taken in connection with the accompanying drawing, forming a part of this invention, in which:

Fig. 1 is a side elevational View of a fan embodying my invention;

Fig. 2 is a front elevational view with the fan blade removed;

Fig. 3 is a fragmentary detail view, in section taken on line IIIIII of Fig. 4 showing one embodiment of the fastening means between the motor housing and fan guard;

Fig. 4 is a fragmentary end elevational view of the structure shown in Fig. 3;

Fig. 5 is a detail view showing, slightly exaggerated, the portion of the fan guard which is attached to the motor housing in Fig. 3;

Fig. 6 is a fragmentary detail view in section taken on line VIVI of Fig. 7, showing a second embodiment of the fastening means between the motor housing and fan guard; and

Fig. 7 is a fragmentary end elevational view of the structure shown in Fig. 6.

Referring now to the drawing more in detail, I show, in Figs. 1 and 2, an electric fan embodyiny my invention. The fan includes a support I I, a motor housing I2 in which the motor parts are mounted, a fan blade I6, and a fan guard 17.

The motor housing [2 is oval in shape and comprises a pair of complementary members It and iii. The motor parts are mounted in the member i8 and the member I9 is attached to the member i8 by means of screws 2|. The screws 2| extend through apertures 22 in member l9 and engage threads (not shown) on the inside of member it. A motor shaft extends through the end of member I8 and carries the fan blade It on its end. The fan blade I6 is attached to the motor shaft by means of a set screw 24 The motor housing I2 is attached to the support 55 H by means of a bracket 26 which is attached to the member i8, and a thumb screw 21.

The fan guard I1 is composed of rings 3|, 32 and 33, and two sets of spokes 34' and 35. The spokes 34 are connected together at the front oi the guard by a plate 36. The two upper spokes 34 are welded to rings 3!, 32 and 33 at points 4%, 4i and 42. The lower spoke 34 terminates at ring 32 to facilitate the removal of the fan blade which will be explained hereinafter, and is welded to the rings 3! and 32- at points 40 and H. The spokes 35 are welded to the rings 3!, 32 and 33 at points 44, 45, and 46 and terminate in axially-extending portions 41 by means of which I the fan guard IT is attached to the motor housing l2.

Referring to Fig. 3, I show one embodiment of my invention. ing apertures 28 extend from the outside surface of the member S8 to the inside and along the inside Wall. The fan guard I1 is attached tothe member 18 by inserting the axially-extending portions 4'. of the spokes 35 in the axially-extending apertures 28 and deforming the ends of the axially-extending portions H. I have shown them swaged at 49 but they may be deformed in any suitable manner. In this embodiment, the axially-extending portions 41 of the spokes 35 are slightly bent as indicated at 50 in 5. It will be readily seen that when the portions 4? are inserted in the apertures 28, the bends 50 will be slightly straightened and the portions 41 will be held tight against the inside walls of the apertures 28 by the spring action of the bends 50, thereby minimizing any possibility of rattling.

From the foregoing description it will be apparent that the guard I1 may be assembled as a unit and installed on the motor housing l8 by simultaneously inserting all of the axiallyextending portions 41 of the guard into the respective axially-extending apertures in the motor housing.

Referring to Fig. 6, I show a second embodiment of my invention. In this form. the axiallyextending apertures 28 extend from the outside of the member l8 to the inside and along the inside wall of the member I 8. The material adjacent the apertures on the inside of the motor housing is slotted as shown in Fig. '7 to form a pair of jaws 48. The fan guard I1 is attached to the member I 8 by inserting the axially-extending portions 41 of the fan guard spokes 35 in the axially-extending apertures 28 and swaging In this form, axially-extend-* the jaws 48 so as to firmly grip the portions 41 of the fan guard spokes 35.

In practicing my invention, the fan guard I1 is permanently attached to the motor housing I2. Accordingly, the fan guard is made so that the blade may be inserted and withdrawn through the guard when attached. In the illustrated embodiment this is done by terminating the lower spoke 34 at the ring 32. To disassemble the fan, the set screw 24 is loosened and the fan blade I6 is slipped off the end of the motor shaft. The fan blade is then removed from inside the guard through the space between rings 3| and 32 at the lower edge thereof. The motor is disassembled by removing the member [9, and then removing the parts from within the shell l8 with the fan guard attached thereto.

The members l8 and I9 which form the motor housing [2 are die-cast and apertures 22 and 2B are formed therein by the same casting operation that forms the members.

From the above description, it will be seen that I have provided a simple and economical means for attaching a fan guard to a motor housing Without the use of expensive eyes and screws. It will also be noted that a more pleasing appearance is provided in that the fan guard is fastened interiorly of the housing and without the use of eyes or screws on the exterior. It will be apparent that no expensive machining operations are required in order to fasten the fan guard to the motor housing.

While I have shown my invention in several forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications, without departing from the spirit thereof, and I desire, therefore, that onl such limitations shall be placed thereupon as are specifically set forth in the appended claims.

What I claim is:

1. In an electric fan, in combination, a fan guard having a plurality of substantially axiallyextending portions, a motor housing having a plurality of substantially axially-extending apertures to receive said axially-extending portions of the fan guard, said axially-extending portions of the fan guard being slightly bent to make them fit tight in the apertures in the motor housing, and the ends of said axially-extending portions of the fan guard being deformed on the inside of said motor housing.

2. An electric fan comprising, in combination, an electric motor including a motor housing, a fan blade carried by the shaft of said motor, a guard for the fan blade including a portion on the side of the fan blade opposite the motor and also including wire frame members formed with substantially axially-extending end portions, said motor housing having therein a plurality of substantially axially-extending apertures to receive said axially-extending end portions, said end portions extending to the interior of the motor housing and being fastened to the motor housing on the inside thereof, thereby attaching said guard to said motor housing, said fan guard being supported by said motor housing, and a support connected to the motor for supporting the fan.

3. An electric fan as set forth in claim 2, wherein said end portions are secured in the m0- tor housing by deforming the same on the inside of the housing.

4. An electric fan comprising, in combination, an electric motor including a motor housing, a fan blade carried by the shaft of said motor, a guard for the fan blade including a portion on the side of the fan blade opposite the motor and also ineluding wire frame members formed with sub- 

